stack created HBASE-6199:
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Summary: Change PENDING_OPEN scope from pre-rpc open to OPENING to
just post-rpc open to OPENING
Key: HBASE-6199
URL: https://issues.apache.org/jira/browse/HBASE-6199
Project: HBase
Issue Type: Improvement
Reporter: stack
PENDING_OPEN currently is a murky state. Its a master in-memory state with no
corresponding znode state that sits between OFFLINE and OPENING states.
The OFFLINE state is set by the master when it goes to open a region. OPENING
is set by the regionserver after its assumed control of a region and is moving
it through the OPENING process. PENDING_OPEN currently spans the open rpc
invocation. This state is in place pre-open-rpc-invocation, during
open-rpc-invocation, and post-rpc-invocation until we get the OPENING callback.
That PENDING_OPEN covers this many different conditions effectively makes it
unactionable.
This issue proposes PENDING_OPEN only be in place post-rpc-invocation. Now its
meaning is clear as the space between rpc-open-invocation and our receiving the
callback which sets RegionState to OPENING. PENDING_OPEN becomes actionable
too in that if a regionserver dies post rpc-open-invocation, we know that we
can reassign the region.
See
https://issues.apache.org/jira/browse/HBASE-6060?focusedCommentId=13292646&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13292646
for more discussion.
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